package wujiuye.morelove.common.utils;

import javax.servlet.http.HttpServletRequest;

/**
 * 自定义访问对象工具类
 * <p>
 * 获取对象的IP地址等信息
 *
 * @author X-rapido
 */
public class CusAccessUtils {

    /**
     * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
     * <p>
     * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
     * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
     * <p>
     * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
     * 192.168.1.100
     * <p>
     * 用户真实IP为： 192.168.1.110
     *
     * @param request
     * @return
     */
    public static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }


    /**
     * 获取客户端设备信息
     * @param request
     * @return
     */
    public static String getUserAgent(HttpServletRequest request) {
        String User_Agent = request.getHeader("User-Agent");
        if (User_Agent.contains("Android") || User_Agent.contains("Linux")) {
            return "Android";
        } else if (User_Agent.contains("iPhone")) {
            return "iPhone";
        } else if (User_Agent.contains("iPad")) {
            return "iPad";
        } else if (User_Agent.contains("Windows")) {
            return "Windows";
        }
        return "unknown";
    }

}